X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fum%2Fkernel%2Fum_arch.c;h=8d84250324b3d2c41d2a6718e7fd0531ecd025b4;hb=cb9aa97c21c59ad01c9514d7faf45dc166fba226;hp=468aba990dbd1652add865bb88f1006ece3a7d16;hpb=c64768a7d671bcde80bca2aed93f9e07edc069c3;p=linux-2.6-omap-h63xx.git

diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 468aba990db..8d84250324b 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -115,7 +115,7 @@ static int have_root __initdata = 0;
 /* Set in uml_mem_setup and modified in linux_main */
 long long physmem_size = 32 * 1024 * 1024;
 
-static char *usage_string =
+static const char *usage_string =
 "User Mode Linux v%s\n"
 "	available at http://user-mode-linux.sourceforge.net/\n\n";
 
@@ -150,7 +150,7 @@ __uml_setup("root=", uml_root_setup,
 static int __init no_skas_debug_setup(char *line, int *add)
 {
 	printf("'debug' is not necessary to gdb UML in skas mode - run \n");
-	printf("'gdb linux'");
+	printf("'gdb linux'\n");
 
 	return 0;
 }
@@ -202,7 +202,7 @@ static void __init uml_checksetup(char *line, int *add)
 
 	p = &__uml_setup_start;
 	while (p < &__uml_setup_end) {
-		int n;
+		size_t n;
 
 		n = strlen(p->str);
 		if (!strncmp(line, p->str, n) && p->setup_func(line + n, add))
@@ -241,6 +241,11 @@ static struct notifier_block panic_exit_notifier = {
 };
 
 /* Set during early boot */
+unsigned long task_size;
+EXPORT_SYMBOL(task_size);
+
+unsigned long host_task_size;
+
 unsigned long brk_start;
 unsigned long end_iomem;
 EXPORT_SYMBOL(end_iomem);
@@ -253,7 +258,9 @@ int __init linux_main(int argc, char **argv)
 {
 	unsigned long avail, diff;
 	unsigned long virtmem_size, max_physmem;
-	unsigned int i, add;
+	unsigned long stack;
+	unsigned int i;
+	int add;
 	char * mode;
 
 	for (i = 1; i < argc; i++) {
@@ -267,6 +274,13 @@ int __init linux_main(int argc, char **argv)
 	if (have_root == 0)
 		add_arg(DEFAULT_COMMAND_LINE);
 
+	host_task_size = os_get_top_address();
+	/*
+	 * TASK_SIZE needs to be PGDIR_SIZE aligned or else exit_mmap craps
+	 * out
+	 */
+	task_size = host_task_size & PGDIR_MASK;
+
 	/* OS sanity checks that need to happen before the kernel runs */
 	os_early_checks();
 
@@ -303,7 +317,7 @@ int __init linux_main(int argc, char **argv)
 
 	highmem = 0;
 	iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
-	max_physmem = CONFIG_TOP_ADDR - uml_physmem - iomem_size - MIN_VMALLOC;
+	max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC;
 
 	/*
 	 * Zones have to begin on a 1 << MAX_ORDER page boundary,
@@ -335,7 +349,9 @@ int __init linux_main(int argc, char **argv)
 	}
 
 	virtmem_size = physmem_size;
-	avail = CONFIG_TOP_ADDR - start_vm;
+	stack = (unsigned long) argv;
+	stack &= ~(1024 * 1024 - 1);
+	avail = stack - start_vm;
 	if (physmem_size > avail)
 		virtmem_size = avail;
 	end_vm = start_vm + virtmem_size;